As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT NR 3453 - ON DEPARTURE FROM DTW, THE RIGHT INTAKE LIGHT WOULD ILLUMINATE 12-15 SECONDS AFTER THE RIGHT INTAKE HEAT SWITCH WAS TURNED ON. AIRCRAFT RETURNED TO DTW WHERE MAINTENANCE FOUND THE RIGHT DE-ICE MODULE TO BE AT FAULT. THE MODULE WAS CHANGED. ALL OPS CHECKS WERE GOOD. (M)